package com.codes.core.utils.dateUtil;

import java.util.Calendar;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;

/**
 * @Description 
 * @Date 2020/8/10 14:11
 * @Created  peanut
 */
public class CalendarUtil {

    public static void main(String[] args) {



        Map m = new HashMap(100);

        Random r = new Random();
        for(long counter=0;;counter++){
            m.put(r.nextLong(),"");
            if(counter%1000000==0) System.out.println(""+counter);
        }



    }

}